The Scene

But the performance will be the star's last for the remainder of the summer (11) after doctor's decided to operate.

She has now scrapped 11 appearances at events like Paris: Orange Rock Corps, Scotland's T In The Park , Oxegen in Ireland and the i-Tunes Festival in London.

In a statement, the star says, "Sorry doesn't feel enough to say, I am devastated for my fans that I know have been waiting to see me and working hard for tickets. I was so excited about the summer and I'm as upset as you all are. But unfortunately these things happen. I have to remain positive and I promise I will make it up later in the year."